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Authors
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Funding
Funding for this research was provided by:
the National Social Science Fund of China (17BJY045 and 18ZDA081)
Project of National Natural Science Foundation of China (72000408)
the Fundamental Research Funds for the Central Universities (19JNQM16)
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Article History
Received: 23 August 2020
Accepted: 10 November 2021
First Online: 11 December 2021
Declarations
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: This study was a secondary analysis conducted according to data from the NMPDMS-2017 conducted by the National Health and Family Planning Commission of China. All those data were subject to multiple stages of reviews by experts to address the methodological, ethical, and legal issues related to data collection. Final approvals of all NMPDMS surveys were required from the Research Ethics Committee of the National Health and Family Planning Commission of China to ensure that the data collection complied with the ethical requirement according to the Statistics Act.
: Not applicable.
: The authors declare that they have no competing interests.
